👉 Epitheliomata are a group of tumors that are typically found in the skin and sometimes other parts of the body, such as the lungs or bladder. They can be benign (meaning they do not cause any symptoms) or malignant (meaning they do cause some symptoms). The exact causes of these tumors vary from person to person, but they often involve a genetic disorder called K-ras mutation. Epitheliomata are usually found in people who have certain mutations in the K-ras